When young, work with every fiber of your being and when old, you’ll have little left _____ about.

Now when people refer to England, you find Wales ____ as well．

    She won’t come over for a visit unless________.

For breakfast he only drinks juice from fresh fruit ___ on his own farm.

On 5 December 2013, China Central Bank prohibited financial institutions from handling Bitcoin transactions, _____  to regulate the virtual currency.